Check the release cat /etc/lsb-release DISTRIB_ID=Ubuntu DISTRIB_RELEASE=20.04 DISTRIB_CODENAME=focal DISTRIB_DESCRIPTION="Ubuntu 20.04 LTS" /etc/apt/sources.list deb http://us.archive.ubuntu.com/ubuntu/ focal main restricted deb http://us.archive.ubuntu.com/ubuntu/ focal-updates main restricted deb http://us.archive.ubuntu.com/ubuntu/ focal universe deb http://us.archive.ubuntu.com/ubuntu/ focal-updates universe deb http://us.archive.ubuntu.com/ubuntu/ focal multiverse deb http://us.archive.ubuntu.com/ubuntu/ focal-updates multiverse deb http://us.archive.ubuntu.com/ubuntu/ focal-backports main restricted universe multiverse deb http://security.ubuntu.com/ubuntu focal-security main restricted deb http://security.ubuntu.com/ubuntu focal-security universe deb … Continue reading Ubuntu 20.04 LTS →